[llvm] Move a lot of symbol code to use the symbol string pool (PR #115796)

[Jared Wyles via llvm-commits]

================
@@ -852,14 +852,14 @@ bool StubsManager_prev7::visitEdge(LinkGraph &G, Block *B, Edge &E) {
 
   Symbol &Target = E.getTarget();
   assert(Target.hasName() && "Edge cannot point to anonymous target");
-  auto [Slot, NewStub] = getStubMapSlot(Target.getName());
+  auto [Slot, NewStub] = getStubMapSlot(*Target.getName());
----------------
jaredwy wrote:

Also on my post landing list :) 

https://github.com/llvm/llvm-project/pull/115796